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4-x/12=3
We move all terms to the left:
4-x/12-(3)=0
We add all the numbers together, and all the variables
-x/12+1=0
We multiply all the terms by the denominator
-x+1*12=0
We add all the numbers together, and all the variables
-1x+12=0
We move all terms containing x to the left, all other terms to the right
-x=-12
x=-12/-1
x=+12
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